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Posted to notifications@dubbo.apache.org by "robocanic (via GitHub)" <gi...@apache.org> on 2023/08/24 08:14:27 UTC
[GitHub] [dubbo] robocanic commented on issue #11876: RpcContext获取参数问题
robocanic commented on issue #11876:
URL: https://github.com/apache/dubbo/issues/11876#issuecomment-1691220310
我也遇到了类似的问题，在dubbo-samples中有一个上下文参数传递的demo [https://github.com/apache/dubbo-samples/blob/4b98c856b8c084fa51d9f0d4bbd6d45fe64cdeea/10-task/dubbo-samples-develop/dubbo-samples-develop-consumer/src/main/java/org/apache/dubbo/samples/develop/ContextTask.java#L37](url)
消费者在setAttachment之后，provider这边是get不到的。
这是consumer
``` java
public void contextServiceCall(){
//往服务端传递参数
RpcContext.getClientAttachment().setAttachment("clientKey1","This is client");
String res = contextService.invoke("context1");
//接收传递回来的参数
Map<String, Object> serverAttachments = RpcContext.getServerContext().getObjectAttachments();
System.out.println("ContextTask clientAttachment: " + JSON.toJSONString(serverAttachments));
System.out.println("ContextService Return: " + res);
}
```
这是provider
```java
@DubboService
public class ContextServiceImpl implements ContextService{
@Override
public String invoke(String param) {
//ServerAttachment接收传递过来的参数
Map<String, Object> serverAttachments =
RpcContext.getServerContext().getObjectAttachments();
System.out.println("ContextService server Receives server Attachments:"+ JSON.toJSONString(serverAttachments));
//往客户端传递参数
RpcContext.getServerContext().setAttachment("serverKey","这是server");
StringBuilder s = new StringBuilder();
s.append("ContextService param:").append(param);
return s.toString();
}
}
```
运行后在consumer这端是可以拿到provider传的attachments的
但是provider拿不到consumer传的attachments：
这是consumer的日志截图：
这是provider的日志截图
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